Synthesis of ortho-chlorobenzalmalononitrile
US3963770A · kind A · utility
2Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1974 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Aug 12, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a synthesis of ortho chlorobenzalmalononitrile by reacting malononitrile with ortho-chloro benzaldehyde in methanol in the presence of a basic catalyst; separating the product crystals from the methanol; washing the crystals with fresh methanol; combining the wash methanol with the methanol filtrate and using the combined methanol in another similar synthesis run and repeating a series of such runs; drying the crystals with a current of turbulent dry air and scrubbing the air with base solution thereby substantially reducing associated problems of effluent treatment and ambient air pollution.
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